Polycrystalline face-centered cubic 4N-purity Co, with a grain size of 2 to 3mm, was investigated at 896 to 1745K by using a tracer/sectioning technique; with 57Co and 60Co. The diffusion coefficients could be described by:

D (cm2/s) = 5.5 x 10-1 exp[-2.99(eV)/kT]

No influence of the magnetic order-disorder transition upon diffusion was detected. It was deduced that diffusion occurred mainly via monovacancies.

W.Bussmann, C.Herzig, W.Rempp, K.Maier, H.Mehrer: Physica Status Solidi A, 1979, 56[1], 87-98